evans



(No Model.) 2 Sheets-Sheet 1.

J. W. EVANS. Hatohway D001 Mechanism. No. 234,464. Patented Nov. 16,1880.

,PETERS, PHOTDLLITHUGRAPHER, WASHINGTON u C (No Model.) 2 Sheets-Sheet. 2. J. W. EVANS. Hatohway Door Mechanism. No. 234,464. Patented Nov. 16,1880.

WITNESSES INVENTOR I WM iS/fw M M fWm ATTORNEY N-FETERS, FHOTCFLITHDGRAPHER, WASHINGTON D C.

Units Stra ns PATENT FFICEQ JAMES W. EVANS, OF NEW YORK, N. Y.

HATC'HWAY-DOOR MECHANISM.

SPECIFICATION forming part of Letters Patent No. 234,464, dated November 16, 1880.

Application filed March 2, 1880.

To all whom it may concern:

Be it known that I, JAMES IV. EVANS, of the city of New York, in the county of New York and State of New York, have invented a new and useful Improvement in Elevators, of which the following is a specification.

The object of my invention is to provide a means of automatically opening and closing the hatches as the elevator approaches or recedes from the same.

Figure 1 is a side view of an elevator constructed according to my invention. Fig. 2is a central vertical sectional view of said elevator, showing the upper hatch closed and the lower one open. Fig. 3 is anienlarged view of the lifting-racks and of the intermediate supporting-gear which transmits motion from one lifting-rack to the other, and also of the driving cog-wheels. Fig. 4 is a cross-sectional View of Figs. 1 and 2 through the lines Z Z, Fig. 1. Fig. 5 is a crosssectional view of Figs. 1 and 2 through the lines WV WV, Figs. 1 and 2. Fig. 6 is an enlarged horizontal section through a line immediately above the gear E. Fig. 7 is a detail, showing the wheels F and Gr detached.

I will now describe the application of my invention to an elevator constructed with two hatches.

Upon the hoisting-shaft J is fastened the hoisting-drum O, which may be either beveled and worm-faced or plane-faced. The best results will be obtained by making the drum (J beveled and worm-faced, in such manner that the circumference of the drum shall vary in the same ratio as the difference in height between the hatches.

To one end of said shaft J is fastened acog- Wheel, H, which is in gear with the cog-wheel Gr, this cogwheel G being firmly fastened upon the shaft I. Upon this shaft I there is also firmly fastened the mutilated wheel F, (see Figs. 6 and 7,) which wheel has cogs on only a segment of its periphery. This wheel F is so adjusted that once in every revolution it makes its cogs move the lifting-rack D, which lifting-rack D, and also the lifting-rack D, are respectively fastened to the lower end of the guiding-rods D and D, hereinafter described, and are supported by the gear- Wheel E.

(No model.)

The gear-wheel E is a loose spur-wheel revolving on the shaft X, between the liftingracks I) and D, with which it is in gear, and it supports said racks, and also transmits motion from one to the other. It will thus be seen (see Figs. 3 and 6) that the cog-wheel H on the end of shaft J gears with the cog-wheel Grfast on the'shaft I, and revolves the latter and with it the mutilated wheel F on the shaft I, which mutilated wheel gears with and operates the rack D, and indirectly operates the rack D by means of the loose gear-wheel E on the shaft X. From the upper end of these lifting-racks D and D extend the guiding-rods D and D, reaching the full length of the hatchway and supported by the bearings Q Q. At each hatch there is fastened on each of these guiding-rods a rack, P. so adjusted as to be in gear with the cogs 0 (two of which are fastened on each hatch) at fixed intervals, as the movements of the elevator-car may require.

Each hatch is in two equal parts,connected by the levers N N, which slide together on the slide M. These levers transmit motion from one section of the hatch to the other, so that when one half opens or closes the other does the same.

The above-described mechanism should he so adjusted that the shaft J will lift the elevator-car to the first hatch in the same time that it causes the segmental cog-wheel F to make one complete revolution. If the floors are of different heights the drum 0 should be so beveled or proportioned as to raise the car the distance the floors are apart in the same time that the mutilated wheel F makes one revolution. This bevel will therefore vary with the different variations in the height of floors in different buildings. If all the floors are of the same height, which is not usual, the drum should be of the same size all across its face. The adjustment of the racks P on the rods D and D will also have to be varied according to the heights of the floors, and will have to be set according to the floors in which the apparatus is used.

It is obvious that the racks d to actuate the hatches in the upper stories should be adjusted so as to have idle movements while the hatches on the lower floors are being operated, and only engage the cogged segments when it is necessary to actuate their hatches, either in opening or closing.

Now, as the cogs in the wheel Fare in gear with the lifting-rack D once for every revolution of said wheel, the rack D and also the guiding-rod D will be forced downward every time the wheel F revolves. This downward motion of said lifting-rack D and guiding-rod D will cause the first rack, P, on said rod to move into gear with the cog O in the first hatch and then pass below the same, and thus open said hatch. As the car continues its ascent and approaches the next hatch said hatch is opened in like manner by the second rack on said guiding-rod. Now, as a like movement in an inverse direction is transmitted from the lifting-rack D to the liftingrack D by means of the gear-wheel E, the first rack in the guiding-rod D will close the first hatch at the same time that the second hatch is opened. This is shown in Fig. 2 of the drawings, where the lower hatchway is presented as opened by the rack on the rod D, and it will be closed, after the car has passed through, by an upward movement of the rack D and rod D, which will cause the rack on rod D to rise and close the lower hatch. At the same time the lifting-rack D and rod D will descend, giving a downward motion to the racks on said rod D, and as the lower rack on this rod is free from its cogged segment it will not affect its hatch, but the upper rack will open the upper hatch for the passage of the car. When the car is descending all the above movements are reversed.

I claim as my ilwention and desire to secure by Letters Patent 1. The guiding-rods D and D, the racks P, the cogs O, the hatch L, and the lever N, in combination with the segmental cog-wheel F, substantially as above set forth.

2. The guiding-rods D and D, the racks .P, the cogs O, the hatches L, the lever N, the cog-wheel E, and the lifting-racks D and D, in combination with the segmental cog-wheel F, substantially as above set forth.

3. The guiding-rods D and D, the racks P, the cogs O, the hatches L, the levers N, the cog-wheels I], G, and H, and the lifting-racks D and D, in combination with the segmental cog-wheel F, substantially as above set forth.

4. The guiding-rods D and D, the racks P, the cogs O, the hatches L, the levers N, and the beveled and worm-faced drum 0, in combination with the segmental cog-wheel F, substantially as above set forth.

JAMES W. EVANS.

\Vitnesses:

THoMAs -B. LOWRY, THos. ALEXANDER, Jr. 

